Reversible propeller



.v n Mp EES? kvm-Fim@ Oct. 18, 1938. A. p HUNTER ETAL 2,133,519

REVERS IBLE PROPELLER Filed NOV- 3, 193e 19 7 70/9/Vf )if Patented oer. 1s, 1938 2,133,519

2,133,519 v REVERSIBLE PROPELLER Alastair Peter Hunter, Orillia, Ontario, and August Eric Pearson, Toronto, Ontario, Canada Application November 3, 1936, Serial No. 108,984

1 Claim. (Cl. 115-34) Our invention relates to improvements in recircular inner ends IIJX and turnably fitting versible propellers, and the object of the invention the recesses 8X and 9 from which extend studs is to devise a propeller of this type in which the and I |0 turnably fitting the oriiices 8 and 9. propeller shaft is divided into two members and The opposing ends of the studs III0 and carry 6 is actuated by the longitudinal movement of bevel gears I2 and I3 which are held in axial 5 i either member in relation to the other to give the alignment by a pin I4 fitting in axially aligned i, blades the required set, and in which the blades, orifices I01 and ||1 (see Fig. 5). i when set, are more rigidly held in their set po- I is a supporting strut which depends in the sition, and it consists essentially of the arrangeusual manner at the stern of the boat and is l0 ment and construction of parts as hereinafter provided at its lower end with a bearing sleeve 10 more particularly explained. I5X in which the sleeve portion 4 of the propeller Fig. 1 is a longitudinal section through our debody turnably ts.

vice. I6 is a control shaft divided into twoportions Fig. 2 is a plan view of our device. one of which is journalled in the sleeve 4 and prol 16 Fig. 3 is a sectional detail on line 3-3 Fig. 1. vided with an internally threaded sleeve enlarge- 15 Fig. 4 is a sectional detail on line 4-4 Fig. 1. ment |6X. The other portion of the control shaft i Fig. 5 is a sectional detail on line 5 5 Fig. 1. forms a thrust member and comprises a squared Fig. 6 is a sectional view of a modified construcportion I1 slidably fitting the squared portion 'I tion. of the sleeve 4 from one end of which extends a Fig. l is a sectional plan view of the construcworm I'IX engaging the internal thread of the 20 tion illustrated in Fig. 6. sleeve |6 and from the other end of which ex- Fig. 8 is a sectional detail on line 8--8 Figs. 6 tends a reduced portion IIJ mounted at its opand '1. posite end in a bearing orifice |50. I8 is a block Fig. 9 is aview partially in elevation and parcarried on the reduced portion |`|0 between two tially in section of a further modification. collars I9 and I9X and provided with a trans- 25 Fig. 10 is an enlarged transverse sectional view verse groove I8X. 20 is a control spindle, to the on line Ill-I0 Fig. 9. lower end of which is secured a disc 2| having a Fig. 11 1S a Similar VieW t0 Fig. 10 0n line l |-l l projection 2|) extending into the groove |8X. Y Fig. 9. By turning the spindle 2D the projection 2| Fig. 12 is a sectional detail on line |2|2 Fig. 3. engages the groove |8 exerting through the 30 In the drawing like characters of reference inblock I8 a longitudinal thrust on the portions |10, dicate corresponding parts in each ligure. I8 and |1X. forcing the worm IIX longitudinally I indicates the engine shaft on which the proof the sleeve II'X rotating the same by its engaged peller body 2 forming a gear housing is mounted thread together with the gear 22. The gear 22 at one end. The body 2 is divided centrally, the meshing with gears I2 and I3 rotates them in 35 divided parts being secured together by bolts 21. opposite directions together with the blades I0 In order to connect the engine shaft I to the body and II to set them either for forward or rear- 2one body portion is provided with a sleeve porward direction drive as required. ti`o`n- 2X having an inwardly tapered orice 20 into If it is desired to operate the reversing mecha- 40 which'the tapered end |0 of the engine shaft I is nism from a position forward, we divide the en- 40 driven. The inner end of the portion |0 is progine shaft and provide a slidable connectionI bevided with a reduced threaded stem |1 on which tween the divided parts as indicated at IX;Y 23 a nut 3 is screwed to bear against the inner end and 24 are thrust bearings. 25 is a sleeve of the sleeve portion 2X. mounted on the engine shaft between the thrust 4 iS a Sleeve pOltOn extending fIOm the other bearings 23 and 24. 26 and 2'I are bearings lo- 46 body portion diametrlcally opposite and in axial cated at each side of the sleeve in which are alignment with the sleeve portion 2X. Internally mounted shafts 28 to each of which is secured the Sleeve Portion 4 S Provided With a Cylindrical a crank 29 connected by links 30 to a suitable enlargement 5 fOTming end ShOulderS 5X and 5, operating lever not shown. The opposite sides an intermediate Cylindrical portion 6 and a of the s1eeve are recessed as indicated at 3| in 50 squared portion 1. 8 and 9 are dlametric orifices which recesses fit discs 32 eccentrically mounted centered on the dividing line between the memon the shafts 28 to engage the opposite ends of bers of the body 2 and provided at their outer ends the recesses 3|. By swinging the cranks 29 forwith annular concentric recesses 8X and 9X. ward or back the eccentrics engage the ends of I0 and I are the propeller blades provided with the recesses to force the sleeve 25 in a corresponding direction against the thrust bearings carrying the movable portion of the engine shaft longitudinally together with the propeller body carried thereby and forcing the cylinder I6 lon-l gitudinally of the Worm II to rotate the gear 22 and thereby adjust'the blades I0 and II to the forward and reverse positions.

In Figures 6, 7 and 8 We have shown a modified structure in which the gears I2 and I3 of Figures 1-5 are replaced by crank arms 33 and 34 prol vided with crank pins 35 and 36. v Links 31 and 38 are mounted at one end on the crank pins 35 and 36 and pivoted at the opposite, end to a headV 39 formed integral with the control shaft 40 which is operated in a similar manner to that above described in connection with Figures 1 to 5.

In Figures 9 to 11 we. show a triple bladed propeller to which the construction Vof Figures 6 to 8 is applied. In Figures 9 to 11, 4I is the engine shaft and 42 the control shaft journalled in the propeller body 43. 44, 45 and 46 are the stub ends of the propeller blades journalled in the body 43 in a manner similar to that previously described With the exception that instead of the pin I4 we employ a spider 41 having pin projections 48 extending into orifices 49 formed axially in the stub ends and the head 50 corresponding to the head 39 of Figs. 6 and 7 is provided with three jaws 5I instead of two connected by links 52 to the cranks 53 of the propeller blades 44, 45 and 46.

What we claim as our invention is:-

The combination with the depending stern strut of a boat and the rotatable propeller, the blades of which are adjustable around their axis, of a longitudinally movable member, means operated thereby for imparting the required set to the propeller blades, a vertical control spindle mounted in the strut, a disc secured to the lower end of the strut, a projection extending from the lower face of the disc, a block mounted freely on the longitudinally movable member, a Vcollar secured to such member at each side of the block,

and a groove formed in the upper face of the 2U block into which the disc projection slidably ts.

ALASTAIR PETER HUNTER. AUGUST ERIC PEARSON. 

